The jury in the trial of Officer William Porter told Judge Barry Williams Tuesday afternoon they are deadlocked.

The jury came in around 3:30 p.m. Tuesday. Williams sent them back for more deliberations after re-reading some of the jury instructions. The jury did not say which of the four charges against Porter are at issue. The jury is not hung. If they were, that would be grounds for Williams to declare a mistrial.

Around 9:15 a.m. Tuesday defense attorney Gary Proctor made a request for a mistrial, and to move this trial out of Baltimore City.

Proctor told the judge his motion was based on the letter that Baltimore City schools CEO Gregory Thornton sent home to parents Monday, warning them of possible unrest. In the letter, Thornton said the school won’t tolerate any students leaving class to protest if Officer Porter is acquitted.

In court, Proctor praised Judge Williams for making sure the jury is not impacted bu outside influences, but he told the judge, "I didn't think their (the jurors') children's homework would be one of them,"

Proctor said barring the mistrial or change of venue, he asked the judge question jurors individually to determine if they have seen the letter or would it influence their decision.

Judge Williams quickly denied the request for the mistrial change of venue and additional questioning saying he is satisfied the jury will base their decision only on the evidence presented.

The jury made three requests for water, highlighters, notepads and an easel. The judge granted those requests.

The jury also asked for the clerk's exhibit list. The judge denied that, noting the list wasn't evidence. The jury also asked for a set of external speakers for the laptop where they can watch video of Porter's interview with detectives, and audio of police radio transmissions from the day of Gray's arrest. That request was granted.

Judge Barry Williams has told this jury there is no time limit on their deliberations, they can deliberate past the 5:30 p.m. closing time of the courthouse, and they should take all the time they need to reach a unanimous verdict.

The jury indicated it would recess at 5:30 p.m. Tuesday, and was sent home soon after that.

After the jury was sent home for the night Tuesday, Baltimore City State;s Attorney Marilyn Mosby was seen entering Courthouse East.

She had not been seen in the courthouse since Monday's closing arguments.

Regardless of the outcome of this trial, Porter is viewed by prosecutors as a "material witness" in the trials of Officer Caesar Goodson and Sgt. Alicia White. Goodson goes on trial January 6. White goes on trial January 25.

This jury has deliberated for 11 hours since receiving the case on Monday afternoon.

At the start of jury selection two weeks ago, Judge Williams told potential jurors fearful of having to give up their Christmas holiday travel plans that he would expect the case to be completed by this Thursday.

The jury is provided with all of the evidence, a laptop to play the video of Officer Porter’s interview with police detectives and even a white board.

In fact jurors asked the board not be erased when they were sent home last night and the judge agreed.

Jurors must give up their phones and electronic devices while deliberating, but they can take breaks to make calls.

Security is tight outside the courthouse where protesters gathered Monday, and more expected today.

Baltimore City Police has cancelled all leave for officers and Mayor Stephanie Rawlings-Blake has called for peaceful protests if the jury acquits Porter on all or some of the charges.

Gray's death in April sparked a week of protests, riots, looting ans a state of emergency in Baltimore City.

University of Maryland School of Law Professor Doug Colbert offers this analysis of Tuesday's deliberations.